The first significant cold-snap of the winter season is expected to invade the entire U.S. this week, just in time for Thanksgiving and major holiday traveling. Previous model runs have also been hinting at a major snowstorm for the central U.S., but this morning's model runs have backed off that solution, but are still indicating the potential for a Nor'easter impacting New England by late week. The GFS forecast MSLP for the evening of Thanksgiving shows the massive Arctic air mass in place, with the developing cyclone in the Canadian Maritimes. Shortly after this time period, this low is expected to "bomb out" just off the coast of Newfoundland, bringing heavy snow and strong winds to Canada and possibly New England. I'm still holding out hope of a snowstorm for here in the central U.S. with the strong baroclinic zone draped from the Great Lakes southwest to the Southern Plains by Midweek -- hopefully we can get a low pressure system to develop along the temperature gradient and move northeast towards the Ohio Valley before the energy is transferred to the East Coast system. If this scenario occurs, then I'll be at ground zero here in Michigan! Stay tuned for updates.